講演情報
[R7P-08]沖縄トラフ熱水鉱床に産するisocubaniteの磁気特性
*加藤 千恵1、大野 正夫1、桑原 義博1、畠山 唯達2、山田 康洋3、戸塚 修平4、島田 和彦4、石橋 純一郎4、長瀬 敏郎5 (1. 九大比文、2. 岡山理大、3. 東京理大、4. 九大理、5. 東北大博物館)
キーワード：
アイトキューバナイト、低温磁気測定、メスバウア分光分析、海底熱水鉱床
We conducted low-temperature magnetometry and Mössbauer spectroscopy on isocubanite collected from hydrothermal deposits in the Okinawa Trough, and isocubanite synthesized by heating a cubanite crystal. Samples undergo a magnetic transition at ~100 K, but the magnetization intensity differed by 50 times. The Mössbauer spectra indicate that the ‘synthesized’ isocubanite suffered the effects of disorder, while the spectra of a chimney sample are consistent with those of chalcopyrite and two iron sites in the ‘Cu1-εFe3+εS4’ phase reported by Wintenberger et al. (1994).